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    Reflecting on a room of one reflectance

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    Publication date
    2007
    Author
    Ruppertsberg, Alexa I.
    Bloj, Marina
    Keyword
    Indirect illumination
    Interreflection
    Surface colour perception
    Rendering
    Colour constancy
    Peer-Reviewed
    Yes
    
    Metadata
    Show full item record
    Abstract
    We present a numerical analysis of rendered pairs of rooms, in which the spectral power distribution of the illuminant in one room matched the surface reflectance function in the other room, and vice versa. We ask whether distinction between the rooms is possible and on what cues this discrimination is based. Using accurately rendered three-dimensional (3D) scenes, we found that room pairs can be distinguished based on indirect illumination, as suggested by A. L. Gilchrist and A. Jacobsen (1984). In a simulated color constancy scenario, we show that indirect illumination plays a pivotal role as areas of indirect illumination undergo a smaller appearance change than areas of direct illumination. Our study confirms that indirect illumination can play a critical role in surface color recovery and shows how computer rendering programs, which model the light¿object interaction according to the laws of physics, are valuable tools that can be used to analyze and explore what image information is available to the visual system from 3D scenes.
    URI
    http://hdl.handle.net/10454/3123
    Version
    No full-text available in the repository
    Citation
    Ruppertsberg, A. I., and Bloj, M. (2007). Reflecting on a room of one reflectance. Journal of Vision. Vol. 7, No. 13, pp. 1-13.
    Link to publisher’s version
    http://dx.doi.org/10.1167/7.13.12
    Type
    Article
    Collections
    Life Sciences Publications

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